AGX Xavier enable uartg/uart7

Robotics & Edge Computing Jetson Systems Jetson AGX Xavier
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12

Hello

for reference, I redid the whole process and added log files, config files or screenlogs everywhere.

Clean start, extract BSP and rootfs from downloaded archives. Run apply_binaries. extract.log (8.7 KB)

Modify Pinmux spreadsheet to enable uartg

uartg
uartg1450×224 7.46 KB

The only file changed is tegra19x-jetson_agx_devkit-pinmux.dtsi: pinmux.diff (2.0 KB)

Generated cfg file with

PINMUX_DIR="~/Linux_for_Tegra/kernel/pinmux/t19x"
python "$PINMUX_DIR/pinmux-dts2cfg.py" \                                         
   --pinmux "$PINMUX_DIR/addr_info.txt" "$PINMUX_DIR/gpio_addr_info.txt" "$PINMUX_DIR/por_val.txt" \
   --mandatory_pinmux_file "$PINMUX_DIR/mandatory_pinmux.txt" \                 
   tegra19x-jetson_agx_devkit-pinmux.dtsi \                                     
   tegra19x-jetson_agx_devkit-gpio-default.dtsi \                               
   1.0

errors: makecfg.log (2.5 KB)
file: tegra19x-mb1-pinmux-p2888-0000-a04-p2822-0000-b01.cfg (29.7 KB)
diff: cfg.diff (1.7 KB)

Put file to Linux_for_Tegra/bootloader/t186ref/BCT/tegra19x-mb1-pinmux-p2888-0000-a04-p2822-0000-b01.cfg

Serial console log for all the rest: boot1-3.log (68.6 KB)

Full flash of AGX Xavier. flash.log (60.0 KB)

Configured via ttyACM, reboot.

Search for uart7 device fails:

  • dmesg | grep -i uart lists only ttyTHS{0, 1, 4}

  • ls /dev/ttyTHS* lists only ttyTHS{0, 1, 4}

  • dtc -I fs -s -O dts /sys/firmware/devicetree/base > sys.dts (359.8 KB) lists serial@c290000 as disabled

  • /sys/kernel/debug/tegra_pinctrl_reg looks alright, uartg selected as pm:
    Bank: 1 Reg: 0x0c302028 Val: 0x00000421 → spi2_mosi_pcc2
    Bank: 1 Reg: 0x0c302038 Val: 0x00000475 → spi2_cs0_pcc3
    Bank: 1 Reg: 0x0c302048 Val: 0x00000421 → spi2_sck_pcc0
    Bank: 1 Reg: 0x0c302050 Val: 0x00000479 → spi2_miso_pcc1

  • journalctl -b attached: journal (294.9 KB)

To be clear: I want a device ttyTHS6 to appear for UARTG and use it to communicate via serial@c290000.